Petrolina climate

Name: Petrolina
Address: BR

Petrolina is warmest in October, with average highs of 34 °C, and coldest in August, when nights average 19 °C. March is the wettest month (86 mm) and September the driest (1.4 mm). Figures are 1991–2020 climate normals.

Across a full year Petrolina averages 400 mm of rain and 363 days above 25 °C.

Brazil · population 418,444 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month October 34 °C
Coldest month August 19 °C
Driest month September 1 mm
Wettest month March 86 mm
Least cloud September 35 % cloud
Hottest on record November 39 °C
Coldest on record July 16 °C

What to expectPetrolina through the year

Petrolina has a clear annual cycle: average daily highs run from 30 °C in August to 34 °C in October, a swing of 4.3 °C in mean temperature across the year.

Counted across a normal year, 363 days a year reach 25 °C, 264 of them reach 30 °C. The warmest reading in the 1991–2020 record is 39 °C, in November.

Rain is strongly seasonal. March averages 86 mm against 1 mm in September — 61 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	32.5 °C	81 mm	61 %
February	32.2 °C	73 mm	62 %
March	32.1 °C	86 mm	61 %
April	31.8 °C	37 mm	57 %
May	30.9 °C	12 mm	55 %
June	29.5 °C	5 mm	54 %
July	29.0 °C	3 mm	50 %
August	30.1 °C	1 mm	43 %
September	32.3 °C	1 mm	35 %
October	33.9 °C	13 mm	38 %
November	33.7 °C	33 mm	54 %
December	33.3 °C	54 mm	57 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	32.5 °C	23.0 °C	27.5 °C	37.3 °C	19.4 °C	31	26
February	32.2 °C	22.9 °C	27.2 °C	37.6 °C	19.2 °C	28	23
March	32.1 °C	22.9 °C	27.2 °C	38.3 °C	19.4 °C	31	24
April	31.8 °C	22.6 °C	26.9 °C	36.9 °C	19.7 °C	30	24
May	30.9 °C	21.8 °C	26.0 °C	36.7 °C	18.5 °C	31	21
June	29.5 °C	20.6 °C	24.6 °C	35.0 °C	17.3 °C	30	11
July	29.0 °C	19.6 °C	23.9 °C	34.1 °C	16.1 °C	31	9
August	30.1 °C	19.4 °C	24.4 °C	35.2 °C	16.4 °C	31	16
September	32.3 °C	20.3 °C	26.1 °C	37.1 °C	16.3 °C	30	26
October	33.9 °C	21.8 °C	27.8 °C	37.9 °C	18.2 °C	31	30
November	33.7 °C	22.8 °C	28.2 °C	38.9 °C	19.6 °C	30	27
December	33.3 °C	23.2 °C	28.1 °C	37.6 °C	19.9 °C	31	28

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	81 mm	9	13 h/day	61 %	59 %	19 km/h
February	73 mm	10	12 h/day	62 %	62 %	19 km/h
March	86 mm	10	12 h/day	61 %	64 %	18 km/h
April	37 mm	6	12 h/day	57 %	63 %	20 km/h
May	12 mm	2	12 h/day	55 %	62 %	23 km/h
June	5 mm	1	12 h/day	54 %	63 %	25 km/h
July	3 mm	0	12 h/day	50 %	61 %	25 km/h
August	1 mm	0	12 h/day	43 %	57 %	25 km/h
September	1 mm	0	12 h/day	35 %	52 %	25 km/h
October	13 mm	1	12 h/day	38 %	49 %	23 km/h
November	33 mm	4	13 h/day	54 %	52 %	21 km/h
December	54 mm	6	13 h/day	57 %	55 %	20 km/h

Where Petrolina ranks

Ranking	Position	Value
The warmest places in South America in December	4th of 50	33 °C
The warmest places in South America in November	6th of 50	34 °C
The warmest places in South America in January	7th of 50	33 °C
The warmest places in South America in February	15th of 50	32 °C
The warmest places in South America in October	17th of 50	34 °C
The warmest places in South America year-round	17th of 50	32 °C

Planning a trip? See the best time to visit Petrolina.

QuestionsCommon questions about Petrolina’s climate

When is the best time to visit Petrolina?

That depends on what you want, so the honest answer is a comparison rather than a single month. June, July, August sit closest to 20 °C on average, October is the warmest month and September the driest. The month-by-month table above has the full picture.

How hot does Petrolina get?

In October, the warmest month, daily highs average 34 °C. About 264 days a year pass 30 °C. The highest value in the 1991–2020 record is 39 °C.

How cold does it get in winter?

Nights average 19 °C in August, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Petrolina?

March, averaging 86 mm over 10 days with rain. The driest month is September with 1 mm. The year as a whole averages 400 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Petrolina rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Data point: -9.399°, -40.501° (the coordinates the reanalysis values are taken for)
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.